/*
 * JaLingo, http://jalingo.sourceforge.net/
 *
 * Copyright (c) 2002-2006 Oleksandr Shyshko
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package ja.centre.gui.mediator;

import javax.swing.*;

public class ListNoneSelectedMediator extends AListBoundMediator {
    public ListNoneSelectedMediator( JList list, JComponent component ) {
        super( list, component );
    }

    protected void updateComponent() {
        component.setEnabled( calculateEnablement() );
    }

    protected boolean calculateEnablement() {
        boolean enabled = true;

        if ( list.getSelectedIndex() == -1 ) {
            enabled = false;
        }
        if ( list.getModel().getSize() == 0 ) {
            enabled = false;
        }
        return enabled;
    }
}
